用“DFC”造句大全，DFC造句
developmentfinancecompany-DFCResearchonTheoriesandMethodsofDesignForCost(DFC)inConcurrentEngineeringDFC(DesignforCost)intheStructureDesignofCompositeMaterialsANALYSISOFCOUPLINGSENSITIVITYOFUNCONVENTIO...
將一幅三角板拼成如圖所示的圖形，過點C作CF平分∠DCE交DE於點F，（1）求*：CF∥AB，（2）求∠DFC...
問題詳情：將一幅三角板拼成如圖所示的圖形，過點C作CF平分∠DCE交DE於點F，（1）求*：CF∥AB，（2）求∠DFC的度數．【回答】（1）*見解析；（2）105°【分析】（1）首先根據角平分線的*質可得∠1=45°，再有∠3=45°，再根據內錯角相等兩直線平行可判定出A...